Method and apparatus for configuring configuration information at user equipment in a mobile communication system

ABSTRACT

A method for configuring configuration information with a user equipment in a mobile communication system is provided. The method includes determining, upon receipt of a Physical Uplink Control Channel/Sounding Reference Signal (PUCCH/SRS) release request from a lower layer, whether configuration information required for a transmission mode supporting Coordinated Multi-Point (CoMP) has been configured, and if the configuration information has been configured, reconfiguring a setting state of the configuration information.

CROSS-REFERENCE TO RELATED APPLICATION(S) AND CLAIM OF PRIORITY

The present application is related to and claims the benefit under 35U.S.C. §119(a) of a Korean patent application filed in the KoreanIntellectual Property Office on Jan. 7, 2013 and assigned Serial No.10-2013-0001750, the entire disclosure of which is incorporated hereinby reference.

TECHNICAL FIELD

The present disclosure relates to a method and apparatus for configuringconfiguration information at a User Equipment (UE) in a mobilecommunication system.

BACKGROUND

In general, mobile communication systems have been developed to providecommunication to users, while ensuring the mobility of the users. Owingto the drastic development of technology, the mobile communicationsystems have reached a development stage in which high-speed datacommunication service as well as voice communication service can beprovided. The 3rd Generation Partnership Project (3GPP) has worked onstandardization of Long Term Evolution (LTE) as one of future-generationmobile communication systems. LTE is a technology that enableshigh-speed packet communication at up to 100 Mbps higher than currentavailable data rates, with the aim at commercialization by around 2010.Compared to voice service, resources can be allocated according to theamount of data to be transmitted and a channel state in data service.Accordingly, a scheduler can allocate transmission resources, takinginto account the amount of resources used for data transmission, achannel state, and the amount of data in a wireless communication systemsuch as a mobile communication system. The same thing can apply to anLTE system as a future-generation mobile communication system. Thus, ascheduler of an evolved Node B (eNB or eNode B) can manage and allocateresources in the LTE system. An evolution of LTE, LTE-Advanced (LTE-A)that increases transmission rates by applying various new techniques toLTE is under active discussion. One of the new techniques can beCoordinated Multi-Point (CoMP). CoMP is a transmission scheme in which aplurality of cells transmit signals through cooperation to a UE that canbe relatively remote from an eNB or experiences severe interference froma neighbor cell.

The above information is presented as background information only toassist with an understanding of the present disclosure. No determinationhas been made, and no assertion is made, as to whether any of the abovemight be applicable as prior art with regard to the present disclosure.

SUMMARY

To address the above-discussed deficiencies, it is a primary object toprovide a method and apparatus for performing a Radio Resource Control(RRC) operation in a User Equipment (UE), when an RRC layer of the UEreceives a Physical Uplink Control Channel (PUCCH)/Sounding ReferenceSignal (SRS) release request from a Medium Access Control (MAC) layer ofthe UE in a Coordinated Multi-Point (CoMP) wireless mobile communicationsystem.

In accordance with an aspect of the present disclosure, there isprovided a method for configuring configuration information with a userequipment in a mobile communication system. The method includesdetermining, upon receipt of a PUCCH/SRS release request from a lowerlayer, whether configuration information required for a transmissionmode supporting CoMP has been configured, and if the configurationinformation has been configured, reconfiguring a setting state of theconfiguration information.

In accordance with another aspect of the present disclosure, there isprovided a user equipment for configuring configuration information in amobile communication system. The user equipment includes a controllerconfigured to, upon receipt of a PUCCH/SRS release request from a lowerlayer through a transceiver, determine whether configuration informationrequired for a transmission mode supporting CoMP has been configuredand, if the configuration information has been configured, toreconfigure a setting state of the configuration information.

Other aspects, advantages, and salient features of the disclosure willbecome apparent to those skilled in the art from the following detaileddescription, which, taken in conjunction with the annexed drawings,discloses exemplary embodiments of the disclosure.

Before undertaking the DETAILED DESCRIPTION below, it may beadvantageous to set forth definitions of certain words and phrases usedthroughout this patent document: the terms “include” and “comprise,” aswell as derivatives thereof, mean inclusion without limitation; the term“or,” is inclusive, meaning and/or; the phrases “associated with” and“associated therewith,” as well as derivatives thereof, may mean toinclude, be included within, interconnect with, contain, be containedwithin, connect to or with, couple to or with, be communicable with,cooperate with, interleave, juxtapose, be proximate to, be bound to orwith, have, have a property of, or the like; and the term “controller”means any device, system or part thereof that controls at least oneoperation, such a device may be implemented in hardware, firmware orsoftware, or some combination of at least two of the same. It should benoted that the functionality associated with any particular controllermay be centralized or distributed, whether locally or remotely.Definitions for certain words and phrases are provided throughout thispatent document, those of ordinary skill in the art should understandthat in many, if not most instances, such definitions apply to prior, aswell as future uses of such defined words and phrases.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of the present disclosure and itsadvantages, reference is now made to the following description taken inconjunction with the accompanying drawings, in which like referencenumerals represent like parts:

FIG. 1 illustrates an example configuration of a general 3^(rd)Generation Partnership Project (3GPP) Long Term Evolution (LTE) systemaccording to this disclosure;

FIG. 2 illustrates an example radio protocol architecture in a general3GPP LTE system according to this disclosure;

FIG. 3 illustrates an example general Radio Resource Control (RRC)operation in response to a Physical Uplink Control Channel(PUCCH)/Sounding Reference Signal (SRS) release request received from aMedium Access Control (MAC) layer according to this disclosure;

FIG. 4 illustrates an example configuration of a Coordinated Multi-Point(CoMP) wireless communication system according to this disclosure;

FIG. 5 illustrates an example of Information Elements (IEs) configuredfor a User Equipment (UE) configured with Transmission Mode 10 (TM10)supporting CoMP according to this disclosure;

FIG. 6 illustrates an example of RRC operation in response to aPUCCH/SRS release request received from a MAC layer in a UE configuredwith TM10 supporting CoMP according to this disclosure; and

FIG. 7 illustrates an example configuration of an RRC layer in a UEaccording to this disclosure.

Throughout the drawings, like reference numerals will be understood torefer to like parts, components, and structures.

DETAILED DESCRIPTION

FIGS. 1 through 7, discussed below, and the various embodiments used todescribe the principles of the present disclosure in this patentdocument are by way of illustration only and should not be construed inany way to limit the scope of the disclosure. Those skilled in the artwill understand that the principles of the present disclosure may beimplemented in any suitably arranged wireless communication system. Thefollowing description with reference to the accompanying drawings isprovided to assist in a comprehensive understanding of exemplaryembodiments of the disclosure as defined by the claims and theirequivalents. It includes various specific details to assist in thatunderstanding but these are to be regarded as merely exemplary.Accordingly, those of ordinary skilled in the art will recognize thatvarious changes and modifications of the embodiments described hereincan be made without departing from the scope and spirit of thedisclosure. In addition, descriptions of well-known functions andconstructions may be omitted for clarity and conciseness.

The terms and words used in the following description and claims are notlimited to the bibliographical meanings, but, are merely used by theinventor to enable a clear and consistent understanding of thedisclosure. Accordingly, it should be apparent to those skilled in theart that the following description of exemplary embodiments of thepresent disclosure is provided for illustration purpose only and not forthe purpose of limiting the disclosure as defined by the appended claimsand their equivalents.

It is to be understood that the singular forms “a,” “an,” and “the”include plural referents unless the context clearly dictates otherwise.Thus, for example, reference to “a component surface” includes referenceto one or more of such surfaces.

By the term “substantially” it is meant that the recited characteristic,parameter, or value need not be achieved exactly, but that deviations orvariations, including for example, tolerances, measurement error,measurement accuracy limitations and other factors known to those ofskill in the art, may occur in amounts that do not preclude the effectthe characteristic was intended to provide.

FIG. 1 illustrates an example configuration of a general 3^(rd)Generation Partnership Project (3GPP) Long Term Evolution (LTE) systemaccording to this disclosure.

Referring to FIG. 1, a Radio Access Network (RAN) of the 3GPP LTE systemcan include evolved Node Bs (eNBs, or eNode Bs) 105, 110, 115, and 120,a Mobility Management Entity (MME) 125, and a Serving GateWay (S-GW)130. A User Equipment (UE) 135 can be connected to an external network,for example, through the eNB 105 and the S-GW 130. The eNBs 105, 110,115, and 120 can correspond to Node Bs in a Universal MobileTelecommunications System (UMTS). Each of eNBs 105, 110, 115, and 120can be connected to a UE through a radio channel and play a more complexrole than a Node B. In LTE, all user traffic including a real-timeservice such as Voice over Internet Protocol (VoIP) can be serviced on ashared channel. Therefore, an entity that collects state informationabout UEs and schedules the UEs can be needed and each of the eNBs 105,110, 115, and 120 can serve as such a scheduling entity. Typically, oneeNB can manage a plurality of cells. To achieve a data rate of up to 100Mpbs, the LTE system can adopt Orthogonal Frequency DivisionMultiplexing (OFDM) as a radio access technology in a bandwidth of up to20 MHz. In addition, the LTE system can use Adaptive Modulation andCoding (AMC) in which a modulation scheme and a channel coding rate aredetermined for a UE adaptively according to a channel state of the UE.The S-GW 130 can be an entity that provides a data bearer. The S-GW 130can generate or release a data bearer under the control of the MME 125.The MME 125 can be an entity that is connected to a plurality of eNBsand performs various control functions.

FIG. 2 illustrates an example radio protocol architecture in a general3GPP LTE system according to this disclosure. Referring to FIG. 2, aradio protocol stack for each of a UE and an eNB in the LTE system caninclude a Packet Data Convergence Protocol (PDCP) layer 205 or 240, aRadio Resource Control (RRC) layer 208 or 238, a Radio Link Control(RLC) layer 210 or 235, a Medium Access Control (MAC) layer 215 or 230,or a Physical layer (PHY) 220 or 225.

The PDCP layers 205 and 240 can be responsible for Internet Protocol(IP) header compression/decompression, ciphering and integrityprotection check on a radio protocol, or the like. The RRC layers 208 or238 can define transmission of control information/messages for handlingradio resources from a higher layer or a related operation/procedure.The RLC layers 210 or 235 can reconfigure a PDCP Packet Data Unit (PDU)to an appropriate size. The MAC layer can be connected to a plurality ofRLC entities. The MAC layer can multiplex RLC PDUs into a MAC PDU ordemultiplex RLC PDUs from a MAC PDU. The PHY layer 220 or 225 cangenerate an OFDM symbol by channel-encoding and modulating higher-layerdata. The PHY layer 220 or 225 can transmit the OFDM symbol on a radiochannel or demodulate and channel-decode an OFDM symbol received on aradio channel. The PHY layer 220 or 225 can transmit the channel-decodedOFDM symbol to a higher layer.

FIG. 3 illustrates an example general Radio Resource Control (RRC)operation in response to a Physical Uplink Control Channel(PUCCH)/Sounding Reference Signal (SRS) release request received from aMedium Access Control (MAC) layer according to this disclosure. For theconvenience of description, the RRC operation will be described based onthe radio protocol architecture illustrated in FIG. 2, by way ofexample.

Referring to FIG. 3, it can be assumed that Transmission Mode 10 (TM10)supporting Coordinated Multi-Point (CoMP) has not been configured forthe UE. For example, if the MAC layer 215 of the UE senses failure of anuplink transmission, the MAC layer 215 can transmit a Physical UplinkControl Channel (PUCCH)/Sounding Reference Signal (SRS) release requestto the RRC layer 208 of the UE. The failure of the uplink transmissioncan be sensed upon an occurrence of an event (such as expiration of atimer) used to determine the validity of an uplink transmission timingfor an uplink transmission or the number of transmissions of an uplinkScheduling Request (SR) message exceeding a maximum transmission number.That is, upon an occurrence of such an event, the MAC layer 215 cantransmit the PUCCH/SRS release request to the RRC layer 208 in the UE.

Upon receipt of the PUCCH/SRS release request from the MAC layer 215 inoperation 301, the RRC layer 208 can release configuration informationin response to the PUCCH/SRS release request in operation 311.Specifically, the RRC layer 208 can release a configuration (such asconfiguration information) of CQI-ReportPeriodic in operation 311. If aSecondary Cell (SCell) can be configured/set for the UE andCQI-ReportConfigSCell can be configured/set for the SCell, aconfiguration (such as configuration information) ofCQI-ReportConfigSCell is released. In addition, a configuration (such asconfiguration information) of SoundingRS-UL-ConfigDedicatedconfigured/set for all of one or more serving cells and a configuration(such as configuration information) of SchedulingRequestConfig can bereleased. The configuration (such as configuration information) ofCQI-ReportPeriodic can be resource configuration information used forthe UE to periodically transmit a Channel Quality Indicator (CQI) of adownlink channel on an uplink, so that an eNB can refer to the CQI inapplying AMC during downlink scheduling. The configuration (such asconfiguration information) of CQI-ReportConfigSCell can be resourceconfiguration information used to periodically transmit a CQI of adownlink channel on an SCell on the uplink. The configuration (such asconfiguration information) of SoundingRS-UL-ConfigDedicated can beresource configuration information about an uplink SRS that the UEperiodically transmits on the uplink, so that the eNB can refer to theSRS in uplink scheduling. The configuration (such as configurationinformation) of SchedulingRequestConfig can be resource configurationinformation for a periodic uplink SR message allocated to the UE.

FIG. 4 illustrates an example configuration of a Coordinated Multi-Point(CoMP) wireless communication system according to this disclosure.Referring to FIG. 4, the CoMP wireless communication system can includea plurality of cells, for example, three cells 400, 410, and 420 (Cell1, Cell 2, and Cell 3). The CoMP wireless communication system can alsoinclude a plurality of UEs that can receive downlink data from theirnearest cells without using CoMP. For example, three UEs 401, 411, and421 (UE 1, UE 2, and UE 3), or a UE 402 (UE 4) can receive downlink datafrom Cell 1, Cell 2, and Cell 3. Each of the UE 1, UE 2, and UE 3 canestimate a channel state using a Reference Signal (RS) For example, aChannel State Information Reference Signal (CSI-RS) can be received fromits serving cell and can transmit feedback data including a channelstate estimate to a central controller 430.

The central controller 430 will be described in brief. A cell can be adata transmission area that can be serviced by a specific transmissionpoint. The transmission point can be a Remote Radio Head (RRH) sharingthe same Cell Identifier (Cell-ID) with a macro eNB in a macro area. Thecell can also be a macro cell or a pico cell, in which each transmissionpoint can have a different Cell-ID. Accordingly, the central controller430 can be an entity, such as an eNB, that can transmit/receive datato/from a UE and process the transmission data/received data. If thetransmission point is an RRH sharing the same Cell-ID with a macro eNB,then the macro eNB can serve as the central controller 430. If thetransmission point is a macro cell or a pico cell having a differentCell-ID, an entity that manages macro cells or pico cells in anintegrated manner can serve as the central controller 430. In FIG. 4,each of Cell 1, Cell 2, and Cell 3 can include an eNB. Specifically,Cell 1 can include a first eNB 431 (eNB 1), Cell 2 can include a secondeNB 432 (eNB 2), and Cell 3 can include a third eNB 433 (eNB 3). TheeNBs 431, 432, and 433 can communicate with the central controller 430.

UE 4 can receive downlink data from Cell 1, Cell 2, and Cell 3 in CoMPand can estimate the channel state of each cell using a CSI-RS receivedfrom the cell. Therefore, the central controller 430 can allocate threeCSI-RS resources corresponding to Cell 1, Cell 2, and Cell 3 to UE 4,for channel state estimation at UE 4. The CSI-RS resources can refer toresources in which CSI-RSs are transmitted.

FIG. 5 illustrates an example of Information Elements (IEs) configuredfor a User Equipment (UE) configured with Transmission Mode 10 (TM10)supporting CoMP according to this disclosure. For TM10 supporting CoMP,an eNB can configure the following configuration information (such aschannel configuration information) for the UE. Specifically, theconfiguration information (such as channel configuration information)can include CSI-RS-ConfigZP-r11 501, CSI-RS-ConfigNZP-r11 511,CSI-IM-Config-r11 521, CQI-ReportPeriod-r10, CQI-ReportPeriodExt-r11531, AntennaInfoDedicated-r11 541, or CSI-Process-r11 551. TheCQI-ReportPeriod-r10 can be channel configuration information forperiodic CQI reporting already existing before the introduction of TM10or the other information which could have been newly introduced for TM10of release 11. The CSI-RS-ConfigZP-r11 501 can be a CSI-RS resourceconfiguration (information) for which the UE assumes zero transmissionpower. The CSI-RS-ConfigZP-r11 501 can indicate no data mapping tocorresponding resources. The eNB can configure/set theCSI-RS-ConfigZP-r11 501 for a serving frequency. The CSI-RS-ConfigZP-r11501 can include the following detailed information. [Table 1]illustrates example CSI-RS-ConfigZP IEs and [Table 2] illustratesexample CSI-RS-ConfigZP field descriptions.

TABLE 1 CSI-RS-ConfigZP information elements -- ASN1STARTCSI-RS-ConfigZP-r11 ::= SEQUENCE {   csi-RS-IdentityZP-r11  CSI-RS-IdentityZP-r11,   resourceConfigList-r11   BIT STRING (SIZE(16)),   subframeConfig-r11   INTEGER (0..154) } -- ASN1STOP

TABLE 2 CSI-RS-ConfigZP field descriptions resourceConfigList Parameter:CSI reference signal configuration, see TS 36.211 [21, table 6.10.5.2-1and 6.10.5.2-2]. subframeConfig Parameter: I_(CSI-RS), see TS 36.211[21, table 6.10.5.3-1].

TS 36.211/36.213[. . . ] in the field description of an IE can indicatethe 3GPP TS 36.211/36.213 standard and a section or table in [. . . ]can be referred to for detailed information about a parameter. The sameformat can apply to other configuration information.

The CSI-RS-ConfigNZP-r11 511 can indicate a CSI-RS configuration (suchas configuration information) for which the UE uses non-zerotransmission power, for CSI-RS channel estimation. The eNB can alsoconfigure/set the CSI-RS-ConfigNZP-r11 511 for the serving frequency.The CSI-RS-ConfigNZP-r11 511 can include the following detailedinformation.

TABLE 3 CSI-RS-ConfigNZP information elements --ASN1STARTCSI-RS-ConfigNZP-r11 ::= SEQUENCE {   csi-RS-IdentityNZP-r11  CSI-RS-IdentityNZP-r11,   antennaPortsCount-r11   ENUMERATED {an1,an2, an4, an8},   resourceConfig-r11   INTEGER (0..31),  SubframeConfig-r11   INTEGER (0..154),   scramblingIdentity-r11  INTEGER (0..503),   qcl-CRS-Info-r11   SEQUENCE {    qcl-ScramblingIdentity-r11 INTEGER (0-503),     crs-PortsCount-r11ENUMERATED {n1, n2, n4, spare1},     mbsfn-SubframeConfig-r11MBSFN-SubframeConfig OPTIONAL -- Need OR   }       OPTIONAL, -- Need OR  ... } -- ASN1STOP

CSI-RS-ConfigNZP field description examples are given in [Table 4].

TABLE 4 CSI-RS-ConfigNZP field descriptions antennaPortsCount Parameterrepresents the number of antenna ports used for transmission of CSIreference signals where an1 corresponds to 1, an2 to 2 antenna portsetc. see TS 36.211 [21, 6.10.5]. qcl-CRS-Info EUTRAN configures thisfield if and only if the UE is configured with qcl-Operation set totypeB. resourceConfig Parameter: CSI reference signal configuration, seeTS 36.211 [21, table 6.10.5.2-1 and 6.10.5.2-2]. subframeConfigParameter: I_(CSI-RS), see TS 36.211 [21, table 6.10.5.3-1].scramblingIdentity Parameter xxx, see TS 36.211 [21, xxx].

The CSI-IM-Config-r11 521 can be a Channel StateInformation-Interference Measurement (CSI-IM) resource configuration(information) that the eNB can configure/set for the serving frequency.The UE can use CSI-IM resources in measuring interference with adownlink channel and the CSI-IM resource configuration (such asconfiguration information) can be included in a channel state estimate.For more information, refer to 3GPP TS 36.211/213. [Table 5] providesexample detailed information included in the CSI-IM-Config-r11 521.

TABLE 5 CSI-IM-Config information elements -- ASN1STARTCSI-IM-Config-r11 ::= SEQUENCE {   csi-im-Identity-r11    CSI-IM-Identity-r11,   resourceConfig-r11     INTEGER (0..15),  subfrarneConfig-r11     INTEGER (0..154),   ... } -- ASN1STOP

[Table 6] below illustrates CSI-IM-Config field description examples.

TABLE 6 CSI-IM-Config field descriptions resourceConfig Parameter:CSI-IM configuration, see TS 36.211 [21, table 6.10.5.2-1 and6.10.5.2-2] for 4 REs. subframeConfig Parameter: I_(CSI-RS), see TS36.211 [21, table 6.10.5.3-1].

The CQI-ReportPeriodExt-r11 531 can be a configuration (information)added to configuration information for periodic CQI reporting of the UE,that is, CQI-ReportPeriod-r10, in order to support TM10. The eNB canconfigure/set the CQI-ReportPeriodExt-r11 531 for the serving frequency.The CQI-ReportPeriodExt-r11 531 can include detailed informationexamples illustrated in [Table 7] and 3GPP TS 36.331/36.211/36.213 canbe referred to for details of the CQI-ReportPeriodExt-r11 531.

TABLE 7 CQI-ReportPeriodicExt-r11 ::= SEQUENCE {  cqi-ReportPeriodicExtId-r11 CQI-ReportPeriodicExtId-r11,  cq-pmi-ConfigIndex-r11 INTEGER (0..1023),  cqi-FormatIndicatorPeriodic-r11 CHOICE {     widebandCQI-r11 SEQUENCE{       csi-ReportMode-r11   ENUMERATED {submode1, submode2} OPTIONAL --Need OR     },     subbandCQI-r11 SEQUENCE {       k     INTEGER (1..4),      periodicityFactor-r11 ENUMERATED {n2, n4}     }   },  ri-ConfigIndex-r11 INTEGER (0..1023) OPTIONAL, -- Need OR  csi-ConfigIndex-r11 CHOICE {     release     NULL,     setup  SEQUENCE {       cqi-pmi-ConfigIndex2-r11   INTEGER (0..1023),      ri-ConfigIndex2-r11   INTEGER (0..1023) OPTIONAL -- Need OR     }  } OPTIONAL, -- Need ON   ... }

The AntennaInfoDedicated-r11 541 can include transmissionMode,codebookSubsetRestriction, or the like, which can be configured forTM10. TS 36.331/36.211/36.213 can be referred to for details of theAntennaInfoDedicated-r11 541.

The CSI-Process-r11 551 can specify a reporting unit in which the UE canreport a CQI, for TM10. The configuration of the CSI-Process-r11 551 canbe linked to information such as the CSI-IM-Config-r11 521. The eNB canconfigure/set the CSI-Process-r11 551 for the serving frequency. TS36.331/36.211/36.213 can be referred to for details of a CSI Process.The CSI-Process-r11 551 can include the following detailed information.

TABLE 8 CSI-Process information elements -- ASN1START CSI-Process-r11::= SEQUENCE {   csi-ProcessIdentity-r11 CSI-ProcessIdentity-r11,  csi-RS-IdentityNZP-r11 CSI-RS-IdentityNZP-r11,   csi-IM-Identity-r11CSI-IM-Identity-r11,   p-C-AndAntennaInfoDedList-r11 SEQUENCE (SIZE(1..2)) OF P-C-AndAntennaInfoDed-r11,   cqi-ReportBothPS-r11CQI-ReportBothPS-r11 OPTIONAL, -- Need OR   cqi-ReportPeriodicId-r11INTEGER (0..maxCQI-Ext-r11) OPTIONAL, -- Need OR  cqi-ReportAperiodicPS-r11 CQI-ReportAperiodicPS-r11 OPTIONAL, -- NeedOR   ... } P-C-r11 ::= INTEGER (−8..15) P-C-AndAntennaInfoDed-r11::=SEQUENCE {   p-C-r11     P-C-r11,   antennaInfoDedConfigId-r11AntennaInfoDedConfigId-r11 } -- ASN1STOP

CSI-Process field description examples that can be included in theCSI-Process-r11 551 are illustrated in [Table 9] below.

TABLE 9 CSI-Process field descriptions antennaInfoDedConfigId Refers toa dedicated antenna info configuration that is configured for the samefrequency as the CSI process. csi-IM-Identity Refers to a CSI-IMconfiguration that is configured for the same frequency as the CSIprocess. csi-RS-IdentityNZP Refers to a CSI RS configuration that isconfigured for the same frequency as the CSI process. cqi-ReportBothPSIncludes CQI configuration parameters applicable for both aperiodic andperiodic CSI reporting, for which CSI process specific values may beconfigured. E-URAN configures the field if and only ifcqi-ReportPeriodicId is included and/ or if cqi- ReportAperiodicPS isincluded and set to setup. cqi-ReportPeriodicId Refers to a periodic CQIreporting configuration that is configured for the same frequency as theCSI process. Value o refers to the set of parameters defined by theREL-10 CQI reporting configuration fields, while the other values referto the additional configurations E-UTRAN assigns byCQI-ReportPeriodicExt-r11 (and as covered by CQI-ReportPeriodicExtId).p-C Parameter: P_(c), see TS 36.213 [23, 7.2.5].p-C-AndAntennaInfoDedList A p-C-AndAntennaInfoDedList including 2entries indicates that the subframe patterns configured for CSI(CQI/PMI/PTI/RI) reporting (i.e. as defined by fieldcsi-MeasSubframeSet1 and csi-MeasSubframeSet2) are to be used for thisCSI process, while a single entry indicates that the subframe patternsare not to be used for this CSI process. E-UTRAN does not include 2entries in p-C-AndAntennaInfoDedList for CSI processes concerning asecondary frequency. E-UTRAN includes 2 entries in p-C-AndAntennaInfoDedList when configuring both cqi-pmi-ConfigIndex andcqi-pmi-ConfigIndex2.

FIG. 6 illustrates an example of RRC operation in response to aPUCCH/SRS release request received from a MAC layer in a UE configuredwith TM10 supporting CoMP according to this disclosure. Referring toFIG. 6, upon sensing failure of an uplink transmission, at operation601, a MAC layer of the UE can transmit a PUCCH/SRS release request toan RRC layer of the UE. The failure of the uplink transmission can besensed in the same manner as described before with reference to FIG. 3and will not be described again herein to avoid redundancy. That is,upon occurrence of an event described with reference to FIG. 3, the UEcan transmit the PUCCH/SRS release request from the MAC layer to the RRClayer, determining that the uplink transmission has failed.

Upon receipt of the PUCCH/SRS release request from the MAC layer inoperation 601, the RRC layer can release configuration information inresponse to the PUCCH/SRS release request in operation 611.Specifically, the UE can release a configuration (such as configurationinformation) of CQI-ReportPeriodic. If an SCell can be configured/setfor the UE and CQI-ReportConfigSCell can be configured/set for theSCell, a configuration (such as configuration information) ofCQI-ReportConfigSCell can be released. In addition, a configuration(such as configuration information) of SoundingRS-UL-ConfigDedicatedconfigured/set for all serving cell(s) and a configuration (such asconfiguration information) of SchedulingRequestConfig can be released.In operation 621, the UE can determine whether correspondingconfiguration information (such as CSI-IM-Config-r11,CQI-ReportPeriodExt-r11, AntennaInfoDedicated-r11, CSI-Process-r11,CSI-RS-ConfigZP-r11, or CSI-RS-ConfigNZP-r11) has been configured forTM10. If the corresponding configuration information has been configuredfor TM10, in operation 631, the UE can release the configurations (suchas configuration information) of CSI-IM-Config-r11,CQI-ReportPeriodExt-r11, AntennaInfoDedicated-r11, or CSI-Process-r11without releasing the configurations (such as configuration information)of CSI-RS-ConfigZP-r11 or CSI-RS-ConfigNZP-r11. SinceCSI-RS-ConfigZP-r11 and CSI-RS-ConfigNZP-r11 can be used for receptionof a Physical Downlink Shared Channel (PDSCH) (such as for receivedPDSCH rate-matching), the UE cannot release CSI-RS-ConfigZP-r11 andCSI-RS-ConfigNZP-r11 even when the UE can sense failure of an uplinktransmission and the configuration information can be related to uplinkchannel quality reporting.

On the contrary, if the configuration information has not beenconfigured in operation 621, the UE can ends the procedure.

FIG. 7 illustrates an example configuration of an RRC layer in a UEaccording to this disclosure. Referring to FIG. 7, a UE 700 can includea transceiver 702, a controller 704, or a configuration informationconfiguration/release unit 706. While the UE 700 can include sub-unitsneeded to implement embodiments of the present disclosure, two or moreof the sub-units can be incorporated into a single sub-unit or one ofthe sub-units may be divided into a plurality of sub-units.

Upon sensing failure of an uplink transmission through a MAC layer, thecontroller 704 can control transmission of a PUCCH/SRS release requestto an RRC layer through the transceiver 702. The failure of the uplinktransmission can be sensed in the same manner as described before withreference to FIG. 3 and thus how failure of an uplink transmission canbe sensed will not be described in detail again herein.

Upon sensing receipt of the PUCCH/SRS release request from the MAC layerat the RRC layer, the controller 704 can control the release ofconfiguration information according to the PUCCH/SRS release requestthrough the configuration information configuration/release unit 706.Specifically, the configuration information configuration/release unit706 can release a configuration (such as configuration information) ofCQI-ReportPeriodic. If an SCell can be configured/set for the UE andCQI-ReportConfigSCell can be configured/set for the SCell, thecontroller 704 can control the release of a configuration (such asconfiguration information) of CQI-ReportConfigSCell through theconfiguration information configuration/release unit 706. In addition,the configuration information configuration/release unit 706 can releasea configuration (such as configuration information) ofSoundingRS-UL-ConfigDedicated configured/set for all one or more servingcells and a configuration (such as configuration information) ofSchedulingRequestConfig. The controller 704 can determine whether thefollowing corresponding configuration information (CSI-IM-Config-r11,CQI-ReportPeriodExt-r11, AntennaInfoDedicated-r11, CSI-Process-r11,CSI-RS-ConfigZP-r11 or CSI-RS-ConfigNZP-r11) has been configured forTM10. If the corresponding configuration information has been configuredfor TM10, the controller 704 can control the configuration informationconfiguration/release unit 706 in the following manner. Theconfiguration information configuration/release unit 706 can releaseconfigurations (such as configuration information) of CSI-IM-Config-r11,CQI-ReportPeriodExt-r11, AntennaInfoDedicated-r11, or CSI-Process-r11without releasing configurations (such as configuration information) ofCSI-RS-ConfigZP-r11 or CSI-RS-ConfigNZP-r11. Since CSI-RS-ConfigZP-r11and CSI-RS-ConfigNZP-r11 can be used for reception of a PDSCH (such asfor received PDSCH rate-matching), the controller 704 can control theconfiguration information configuration/release unit 706 not to releaseCSI-RS-ConfigZP-r11 or CSI-RS-ConfigNZP-r11 even when the UE can sensefailure in an uplink transmission and the configuration information canbe related to uplink channel quality reporting.

The proposed method and apparatus for configuring configurationinformation at a UE in a mobile communication system may be implementedas computer-readable code in a computer-readable recording medium. Thecomputer-readable recording medium may include any kind of recordingdevice storing computer-readable data. Examples of the recording mediummay include Read Only Memory (ROM), Random Access Memory (RAM), opticaldisk, magnetic tape, floppy disk, hard disk, non-volatile memory, andthe like, and may also include the medium that is implemented in theform of carrier waves (for example, transmission over the Internet). Inaddition, the computer-readable recording medium may be distributed overthe computer systems connected over the network, and computer-readablecodes may be stored and executed in a distributed manner.

Although the present disclosure has been described with an exemplaryembodiment, various changes and modifications may be suggested to oneskilled in the art. It is intended that the present disclosure encompasssuch changes and modifications as fall within the scope of the appendedclaims.

1.-14. (canceled)
 15. A method for releasing a radio resource by aterminal in a wireless communication system, the method comprising:receiving, from a lower layer, a release request for a physical uplinkcontrol channel; and releasing a radio resource for a channel qualityindicator (CQI) report; wherein if a specific transmission mode isconfigured for a serving cell, the radio resource for the CQI reportcomprises a radio resource for a periodic CQI report.
 16. The method ofclaim 15, wherein the specific transmission mode comprises atransmission mode
 10. 17. The method of claim 15, wherein if thespecific transmission mode is configured for the serving cell, the radioresource for the CQI report further comprises a radio resource forchannel state information (CSI) interference measurement (IM).
 18. Themethod of claim 15, wherein the release request is related to thephysical uplink control channel and a sounding reference signal (SRS).19. The method of claim 15, wherein the radio resource for the CQIreport further comprises at least one of a first CSI configurationresource, a second CSI configuration resource, and a third CSIconfiguration resource, the first CSI configuration resource forinformation providing resource configuration about a channel stateinformation reference signal (CSI-RS) requiring non-zero transmissionpower, the second CSI configuration resource for information indicatinga reporting unit of the CQI report, the third CSI configuration resourcefor providing a CSI-interference measurement (IM) resource.
 20. A userequipment (UE) for releasing a radio resource by a terminal in awireless communication system, the UE comprising: a receiver configuredto receive, from a lower layer, a release request for a physical uplinkcontrol channel; and a controller configured to release a radio resourcefor a channel quality indicator (CQI) report; wherein if a specifictransmission mode is configured for a serving cell, the radio resourcefor the CQI report comprises a radio resource for a periodic CQI report.21. The UE of claim 20, wherein the specific transmission mode comprisesa transmission mode
 10. 22. The UE of claim 20, wherein if the specifictransmission mode is configured for the serving cell, the radio resourcefor the CQI report further comprises a radio resource for channel stateinformation (CSI) interference measurement (IM).
 23. The UE of claim 20,wherein the release request is related to the physical uplink controlchannel and a sounding reference signal (SRS).
 24. The UE of claim 20,wherein the radio resource for the CQI report further comprises at leastone of a first CSI configuration resource, a second CSI configurationresource, and a third CSI configuration resource, the first CSIconfiguration resource for providing resource configuration informationabout a channel state information reference signal (CSI-RS) requiringnon-zero transmission power, the second CSI configuration resource forindicating a reporting unit of the CQI report, the third CSIconfiguration resource for providing a CSI-interference measurement (IM)resource.